Which of the following did the document quoted here proclaim the roman empire?

The correct answer is B) Freedom of worship to all citizens of the Roman Empire. This quote is part of Edict of Milan issued in 313 A.C. which proclaimed that all the citizens had the right of choosing the religion that they wanted and no cult would be persecuted.

the use of email to replace slower surface mail.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)